A measurement is taken of one of the juvenile fish set to be released this weekend.

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You can hear about the sturgeon release party about a minute in on today's Environment Report.

This Saturday, 35 baby sturgeon will be released into the Kalamazoo River at a sturgeon release party. It’ll be in New Richmond and it’s open to the public.

Lake sturgeon are ancient fish. They’re Michigan’s oldest and biggest fish species and can live to be more than 100 years old. Many populations of lake sturgeon in the Great Lakes were wiped out decades ago, but people have been working to bring them back.

Kregg Smith is a senior fisheries biologist with the Michigan Department of Natural Resources. Raising sturgeon in a hatchery is no easy task, and Smith says it takes a lot of people pitching in.

"Well, the first thing it takes is a lot of partnerships with other agencies, tribal governments and nonprofit folks from the public because they are very low in population size, so it takes a lot of money and a lot of resources to collect the eggs and the larval fish from the river," Smith said.

It'll take decades to get the fish's numbers back to where managers want them to be

"Given their life history characteristics, it'll take a couple more decades before we'll even start to see fish that we are releasing [now] return." -- Kregg Smith, Michigan Department of Natural Resources

Smith explains that the sturgeon in the Kalamazoo River are genetically unique to the river. He says the goal of the hatchery is to stabilize the population first, "so we're trying to prevent the populations from declining until we can then later develop some spawning habitat in the river system," he said. "And then, our secondary goal would be to increase the population to a sustainable level that would allow for a recreational sport fishery."

Smith says the most recent population estimate for sturgeon in the Kalamazoo River is 112 individual adult fish; the goal is about 530 adults. It's an uphill battle to bring back that number of fish. "Given their life history characteristics, it'll take a couple more decades before we'll even start to see fish that we are releasing [now] return."

Smith says it's a slow process because female sturgeon take a long time to reach sexual maturity.

There are a few places in Michigan where you can legally fish for lake sturgeon because those populations are big enough. Smith says overall, sturgeon numbers in the Great Lakes region are improving.

"We're seeing better production at eight facilities around the Great Lakes basin," Smith said. "We're able to recover them through artificial stocking but we're also seeing populations that were at moderate to medium size; they're starting to increase with protection from closing the fishery as well as improvements in water quality."

He says kids who come to the sturgeon release party can help release juvenile sturgeon into the river. The event is this Saturday, September 6 from 10 a.m. to 2 p.m. at New Richmond Bridge County Park.

PORT CLINTON, Ohio (AP) - Ohio's wildlife agency is looking at bringing a prehistoric fish back to Lake Erie. The Ohio Department of Natural Resources is looking into whether it can reintroduce breeding populations of sturgeon to the lake.

Sturgeon were once plentiful but thought to be all but gone from Lake Erie less than two decades ago.

It’s been a fantastic summer for one lake sturgeon hatchery in Michigan.

Many lake sturgeon populations in the Great Lakes were wiped out decades ago. Demand for their eggs for caviar led to overfishing. Plus, dams built to power industry blocked sturgeon spawning grounds upstream.

Unfortunately, things didn’t go very well for the new hatchery in the Kalamazoo River. Of the couple thousand eggs they had, only 52 survived. They were released into the river earlier this summer without much fanfare.

But I found another hatchery for lake sturgeon in Michigan that had an awesome year. This one is way up near Onaway, at the tip of the Lower Peninsula. They had a big release party last week.

It’s near the end of spawning season for Michigan’s oldest and biggest fish species, the lake sturgeon. Overfishing and hydraulic dams built to power industry have wiped out many lake sturgeon populations in the Great Lakes.

A group of people and government agencies are trying to increase the odds the kind of sturgeon specific to the Kalamazoo River will survive.

Sturgeon have been around since the age of dinosaurs. So they’re a lot different from other fish in the Great Lakes. They don’t have a normal skeleton. Instead, they’ve got these bony plates on the outside of their bodies, called scutes. They have no fish scales.

Lake sturgeon are amazing fish. They can weigh several hundred pounds and they can live to be 100 years old.

Sturgeon used to be abundant throughout the Great Lakes region. But they were overfished, and construction of dams on rivers where they spawn hurt their reproduction. They’re now a state threatened species.

Tim Cwalinski is a fisheries biologist with the Michigan Department of Natural Resources. He says these days, sturgeon are carefully managed. There are a few fishing seasons for sturgeon in different parts of the state.

The season for sturgeon in Black Lake in Cheboygan County opens February 2nd. Tim Cwalinski says there are about 1,200 adult sturgeon in the lake. The quota this year is just six fish total for all the fishermen combined.